function s1_hello(){
    echo "hello, world!";

}
function s2_tell_who_i_am(){
    whoami;
}
function s3_which_distro_do_i_use(){
    if [[ -f /etc/os-release ]];then
    source /ect/os-release
    echo "NAME=\"$NAME\""
    elif [[ -f /etc/lsb-release ]];then
    . /ect/lsb-release
    echo "NAME=\"$DISTRIB_ID\""
    else 
        cat /etc/issue | head -n 1 | sed 's/\\n//g' | sed 's/\\r//g' | sed 's/^\\s*//g' 
    fi
}
function s4_view_my_cpu_arch(){
    
    uname -m;
}
function s5_show_first_scsi_disk_size(){
     lsblk -1 | \grep disk | \grep '^sad' | awk '/^sda/ {sub(/G$/,"",$4); print $4}'
}
function s6_show_main_memory_size_in_megabytes(){
    free -m | grep "Mem:" | awk '{print $2}'
}
